CPC B64D 11/064 (2014.12) [B60N 2/938 (2018.02); B64D 11/0643 (2014.12); B60N 2/23 (2013.01); F16D 3/06 (2013.01)] | 9 Claims |
1. An aircraft seat comprising at least one actuator configured to generate movement and at least one movement transmission device, the transmission device comprising:
a support;
a frame that is fixed relative to the support, said frame being provided with an immobilizing portion,
a drive shaft driven by the actuator to rotate about an axis of rotation,
a gear wheel provided with coupling teeth having inclined side walls, said gear wheel being freely rotatable relative to the drive shaft;
a sleeve slidably mounted on the drive shaft and integral in rotation with the drive shaft, the sleeve comprising a complementary immobilizing portion configured to couple with the immobilizing portion of the frame as well as coupling teeth having inclined side walls configured to couple with the coupling teeth of the gear wheel; and
an elastic member configured to push the sleeve along an axial direction towards the gear wheel to couple the sleeve to the gear wheel; the elastic member having a stiffness; the stiffness of the elastic member and the inclination of the side walls of the coupling teeth of the gear wheel and of the coupling teeth of the sleeve being chosen such that, when a torque greater than a threshold torque is applied to the gear wheel, the sleeve slides on the drive shaft from a driving position in which the sleeve is coupled to the gear wheel, to an immobilizing position in which the immobilizing portion of the frame is coupled to the complementary immobilizing portion of the sleeve.
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